Centrifugal machine.



No. 643,667. Patented Feb. 20, |900. M. DE MARCHEVILLE. GENTBIFUGAL MACHINES.

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No. 643,667. Patented Feb. 20, |900. M. DE MARCHEVILLE.

CENTBIFUGAL MAGHINE.

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FFICE.

PATENT MARCEL DE MARCHEVILLE, OF PARIS, FRANCE.

CENTRIFUGAL MACHINE.

SPECIFICATION forming para of Letters Patent No. 643,667, dated February 2o, 1900.

Application filed October 10. 1899.

To @ZZ whom, it may concern: A

Be it known that I, MARCEL DE MARCHE- v'ILLE, manufacturer of chemical products, of 44. and 46 Rue de Chateau-Landon, in the city of Paris, Republic of France, have invented Improvements in Centrifugal Machines, of which the following is a full, clear, andexact description.

This invention relates to a centrifugal machine for eecting the automatic and continuous separation of any kind of substance held in suspension in a liquid and for enabling such separated material to be collected Without interfering with the action of the apparatus.

This improved centrifugal machine is distinguished by the employment of a mechanical device operated by the machine-shaft for successivelyeffecting the following opertions with the aid of different cams: first, opening and closing a valve to permit of the introduction into the centrifugal of the liquid to be treated; second, opening and closing a cock for the admission of the liquid used for Washing, and, third, setting in action an extractor used for scraping out and removing the separated material from the machine and at the same time opening and closing the hopper through which said material is discharged.

My invention is illustrated in the accompanying drawings, wherein- Figure 1 represents va front elevation of the machine with the drivinggear removed. Fig. 2 is a vertical axial section of the machine; and Fig. 3 is a plan of the same, the upper part of the casing being removed. Fig. 4 is a detail view of the transmissiongear. Fig. 5 is a transverse section of the channel by means of which the liquid to be treated is supplied to the apparatus. Fig. 6 is a detail in face and end view of the knife or scraper forming part of the extractor.

The same letters of reference denote like parts in all the gures.

The machine comprises a drum a, keyed on a shaft b and inclosed Within an outer casing c, constituting the framing of the apparatus, which isprovided with bearings for the shaft b, the upper part of said casing being made detachable. The shaft b carries at one extremity a driving-pulley d and at its op- Serial No. 733,144. (No model.)

posite extremity a worm e, which gears with a Worm-wheelf, keyed on an intermediate shaft g, upon which is loosely mounted a worm h, which may be caused to partake in the motion of the shaft by means of a clutch o', said worm h being in gear with a worm- Wheel j, keyed on a shaft lo, bearing the several cams Z m n, Which respectively perform the following functions, viz: The cam Z in its rotation acts on a spring-pressed rod o, so as to open the valve for-the admission of the liquid under treatment,which enters through pipe p and is distributed in the interior of drum a by means of the conduit q, which is open along one side, as shown in Fig. 5. The cam m in rotating osoillates a lever o", and thereby opens the cock for the admission of Washing liquid, which is supplied through pipe s and discharged in the interior of drum a by a perforated pipe t, disposed above the conduit q, upon which the liquid falls and is thus projected in all directions. The cam 'it acts upon a rod u, to which are jointed levers n and w, the lever o being keyed on a shaft fu', upon the extremity of which is mounted an arm carrying a scraper a: for detaching the dried material from the Walls of drum @,which falls into ahopper y, projecting up Within said drum, as shown in Fig. 2. The scraper may also be capable of longitudinal movement within the drum, in which case the scraper would have a double movement-viz., first, an angular movement for causing the scraper to penetrate the material to be extracted, and, second, a longitudinal movement for effecting the dislodgment of the entire mass.

The mouth of the hopper y is provided with a couterbalanced shutter e, which is kept closed during the operation, so as to effectually prevent the escape of any noxious vapors orodors which may be given off by the liquid under treatment and is opened automatically by the oscillation of lever w on its axis w during the time that the separated material is being removed by the scraper fr, so as to permit of the discharge of said material from the hopper. Y

The apparatus herein described is adapted for separating any material held in suspension in a liquid and for completely expelling the liquid from such material. For example,

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ratus, the clutch z' is thrown out of gear, and

the mechanisms by which the several operations are effected are only put into action (with the aid of clutch i) after the drum @has attained its normal speed. The valve upon ro the supply-pipe p is rst opened by means of cam Z, so as to introduce a certain quantity of ammoniacal solution into the apparatus, when bythe rapid rotation of drum a the crystals are separated from the liquid and adhere x5 to the drum. The cock on pipe s is then opened by means of cam m, so as to admit the washing liquid (water, for example, as in the present instance) for the purpose of carrying off the mother-liquor. On the cock be` 2o ing closed the whole of the liquid contained in the drum will be completely separated from the bicarbonate-of-soda crystals adhering to the drum a, owing to the speed of rotation of the latter and the slight thickness of the layer 2 5 of bicarbonate deposited at each operation.

The knife or seraper is then brought by the action of cam n into contact with the wall of drum ct, so as to detach the crystals, which fall through the hopper y, the passage through 3o which is at the same time opened by the raising of the shutter .2', which had closed the hop- /p r during the operation in order to prevent tlti/escape of the ammoniacal vapors into the a nosphere. The am moniacal solu tion and 3 5 washing-water iiow out through the outlet c provided on the casing c. After the crystals of bicarbonate of soda have been removed, as above described, a fresh quantity of ammoniacal solution is admitted into the appara- 4o tus and the operations previously described are repeated, and so on indefinitely.

In order to insure a constant equilibrium of pressure between the interior of the drum and the space comprised between the drum and casing (in which latter sp'a'c'e there' would otherwise exist compression) communication may be established by suitable means between these two spaces.

AThe drawings represent a machine whose drum is mounted to rotate about a horizontal axis; but it is to be understood that my improved centrifugal machine may be arranged with the axis either horizontal or vertical and that the form and dimensions may be varied and the accessory details modified to suit different applications.

In a machine for the separation of material held in suspension in a liquid, comprising a drum mounted to rotate within a fixed casing and provided with two valve-controlled inlets, the one for the substance or mixture to be treated and the other for a washing liquid, a hopper leading to a normally-closed dischargeoutlet, and a movable scraper for detaching the separated material from the interior of the drum and directing the same into the hopper; the combination, with the shaft upon which the drum is mounted to rotate, of a camshaft driven thereby and levers or tappets actuated by the cams and in operative connection with the valves, scraper and shutter, the form of the cams and their angular arrangement relatively to one another being such as to bring about in proper sequence, and in constantly-recurring cycle, the opening and closing of the valves controlling the inlets, the bringing of the scraper into operative position, and the opening and closing of the discharge-aperture substantially as specified.

The foregoing specification of my improvements in centrifugal machines signed by me this 27th day of September, 1899.

MARCEL DE M ARCHEVILLE.

Witnesses:

J. ALLIsoN BOWEN, MAURICE HENRI PIGNET. 

